Gun sight



June 25, 1935. LOWE 2,005,866

I GUN SIGHT Filed Oct. 12, 1952 n; 4 mm wwww Ill?" 4 will! '17,

INVENTOR. KENNETH J. Lowe BY W ' ATTORNEY Patented June 25, 1935 UNITED STATES PATENT OFFICE GUN SIGHT Kenneth J. Lowe, Ilion, N. Y., assignor to Remington Arms Company, Inc., a corporation of Delaware Application October 12, 1932, Serial No. 637,443

6 Claims.

This invention relates to vertically and laterally adjustable sights for firearms, commonly identified in the art as wind gauge sights.

The invention contemplates a sight of high accuracy comprising a minimum number of ruggedly constructed parts arranged with a view to the securing of maximum efiiciency and the greatest simplicity of manipulation.

More specifically, one object of the invention is to provide a wind gauge sight adapted for attachment to the receiver of a firearm in such a manner as to be readily removed and replaced at will without disturbing the range adjustment, and when mounted on the firearm to be firmly and accurately held in place.

A further object of the invention is to provide a wind gauge sight having the indices which show the positions of both vertical and lateral adjustment of the sight so placed and formed as to be readily visible to the shooter when in shooting position, thus obviating the necessity of altering the shooters position in order to effect either lateral or vertical adjustment of the sight during firing.

A further object of the invention is to provide an improved means of adjustably securing the sight base to the mounting block; the means provided comprising a screw connection and devices for preventing any lost motion, commonly designated back lash, when the direction of rotation of the adjusting screw is reversed.

;A further object of the invention is the provision of an improved means of adjustably securing an elevation index to the sight base.

A further object of the invention is to provide a transverse position determining and adjusting means whereby the sighting member is adjusted transversely in accordance with the direction of rotation of a rotatable manipulative device; that is, an adjustment of the sight to the right is effected by the right hand rotation of the manipulative device, and an adjustment to the left is effected by a left hand rotation thereof.

With these and other objects in view, the invention contemplates certain novel elements, constructions and combinations of parts, a representative embodiment of which is illustrated in the accompanying drawing and will be hereinafter more fully described.

In said drawing:

Fig. 1 is a rear elevation of a sight embodying one form of the present invention, together with as much of a firearm as is necessary to show the attachment of the sight thereto.

Fig. 2 is an enlarged transverse sectional elevation showing the construction of the vertical and lateral adjusting means, as well as the devices for securing the sight mounting block to the receiver of a firearm.

Fig. 3 is a left side elevation of the depending arm of the sight base, showing the attachment thereto of an elevation indicating scale.

Fig. 4 is a horizontal section, substantially on the line 44 of Fig. 2.

Numeral I0 indicates the stock and numeral I I the receiver of a firearm to which the sight of the present invention may be secured. The securing means comprises a dove-tail block I2 extending longitudinally of the receiver and permanently secured thereto. These blocks are of conventional form, being referred to in the trade as V-blocks. The sight mounting block I3 is provided with a longitudinal dove-tail recess adapted to receive the V-block I2. The means for securing the mounting block I3 upon the V-block I2 may take various forms. The form which has been selected for purpose of illustration comprises a lever I4 mounted on a horizontal longitudinal pivot I5 in the mounting block I3 and partially housed in a recess I6 in said mounting block.

The V-block I2 is provided with a recess I'I, preferably located about midway of its length and adapted to receive the lower end of the lever I4, and said lever is pressed into said recess by a suitable spring I8. The spring IB has been illustrated as partially housed in a transversely extending well in the lever I4, above the pivot of said lever, and as engaging the surface of the mounting block forming the base of the recess I6. The mounting block is so formed, as clearly shown in Fig. 2, that the upper end of lever I4 projects therefrom to form a conveniently located manipulating finger piece by which the lower end of lever I4 is pressed outwardly to permit the mounting block to be slid longitudinally over the V-block I2 until the lever I4 comes opposite the recess I! in said block. The mounting block thus positioned may be locked in place by any suitable means, the devices for this purpose which have been selected as illustrative comprising a screw I9 threaded into a horizontal longitudinally extending aperture in the mounting block I3. Said screw is provided with a knurled head 20 and a conical point 2| adapted to engage the side of lever l4 above its pivot, as shown in Figs. 2 and 4. The mounting block and sight carried thereby being properly positioned with respect to the V- block I2, the screw I9 is advanced and the conical point 2| thereof passes behind and into engagement with a art of lever I4 above its pivot, thus 2 I firmly engaging the lower end of said lever in the notch 1.

Supported upon the mounting block l3, by

, means of a depending arm 22 and a screw 23, is

a sight base 24. The depending arm 22, which is preferably integral with the horizontally extending member 24 forming the sight base proper, is of dove-tail shape adapted to be received in a corresponding dove-tail groove 25 in the mounting block. The screw 23, which is rotatably supported in the sight base 24 in a manner to be presently described, is received in a threaded aperture 26 in the mounting block. Thus the sight base 24 is adjusted vertically upon the mounting block l3, which block is removably attached to the receiver I I. The use of this construction permits the sight to be removed from the receiver and replaced thereon without 'altering or in any way disturbing its adjustment. Said threaded aperture 26 communicates with a bore 21 of larger diameter than the aperture 26 and adapted to contain certain devices which cooperate with the screw 23 and the mounting block I 3 in such a manner as to insure that any rotation of thescrew 23 in either direction will produce a corresponding vertical movement of the sight base. It is well known that in the absence of such devices, due to manufacturing error, there may be a slight clearance or looseness between the threads of screw 23 and those of aperture 26,- which results in a lost motion, commonly referred to as back lash, when the direction of rotation of the screw is reversed.

- A preferred embodiment of the back lash preventing devices is as follows:

3 A nut or-bushing 28 is inserted in the bore 21 and threaded onto the part of the screw 23 extending below the threaded aperture 26 and into said bore. Said nut may be held against rotation by suitable means, such as a set screw 23,

' extending transversely through the adjacent wall ceive an exteriorly threaded sleeve 32, which sleeve is provided with suitable slots 33 to receive the end of an adjusting tool. Above its threaded portion the sleeve 32 preferably comprises a smooth section 34 of substantially the full diameter of the bore 21, joined to the threaded portion 32 by a section of reduced wall thickness. One or more longitudinal slots may be cut through the wall of section 34 and the connecting section, it being contemplated that these parts will be spread, prior to tempering, so that when assembled the frictional engagement of the section 34 with the wall of bore 21 will prevent displacement of the sleeve from the position to which it is adjusted.

The upper face of the sleeve 32 engages the lower face of the bushing 28. It will be seen that by vertically adjusting the sleeve 32 in the bore 21 the bushing 28 may be thrust upwardly with respect to the threads of the screw 23. Such upward movement of the bushing 28 will bring the upwardly facing parts of its threads into close engagement with the downwardly facing parts of the threads of screw 23, thus tending to thrust said screw upwardly and effect a close engagement of the upwardly facing threads thereof with the threads of aperture 26. A positive vertical movement of the screw when rotated in either direction is thus insured.

The means for accurately holding the Screw 23 in the sight base 24 in such a manner as to permit its free rotation in said sight base, without vertical movement relative thereto, may be constructed as follows: 7

The screw 23 passes through an aperture 36 in the sight base, the lower part of which aperture comprises a countersink of enlarged diameter adapted to receive the collar 31 upon and preferably integral with the screw 23. The intermediate section of the aperture inthe sight base 24 receives a smooth section 38 of the screw 23, and above said smooth section the screw comprises a threaded section 39 adapted to receive a nut 40. Between the nut 40 and the upper surface of the sight base 24 is a washer 4| which is keyed to the screw .23 to rotate therewith, thus eliminating friction between the adjusting nut 46 an'dthe sight basewhich would tend to alter the position of adjustment of said nut. It will be apparent that, by properly adjusting the nut 40, the screw 23 may bearranged to rotate freely in the sight base 24, without vertical movement relative thereto. A manipulating finger piece 42 is joined to the upper end of screw 23 by any suitable means such as a set screw 43 engaging the periphery of screw 23 or a suitable groove 44 therein. Finger.

piece 42 is provided with an index 45 co-operating with a reference mark 46placed upon the rearwardly facing edge of said sight base 24, as clearly shown in Fig. 1. Suitable means are provided for yieldably holding the finger piece 42 and the adjustment screw 23 connected therewith in positions such that one of the marks on the index 45 coincides with the reference mark 46. This means may comprise indentations 41 in the lower margin of said finger piece 42, co-operating with a plunger or ball 48 pressed upwardly by a spring 49 housed in a suitable well in the sight base 24, all as clearly shown in Fig. 2. Since the range of vertical adjustmentof the sight contemplates a plurality of rotations of the finger piece 42, a suitable elevation index is preferably associated with the depending arm 22 of the sight base. This index, shown in Fig. 3, co-operates with a suitable reference mark or pointer on the mounting block l3. Said reference mark is not illustrated since it forms no part of the present invention. According to the present invention, however, the elevation scale or index,instead of being impressed directly upon the arm 22, is placed upon a separate plate 5| adjustablyheld upon the arm 22 by suitable means such as screws 52 passing through slots 53 in the index plate 5| and threaded into the arm 22. By loosening the screws 52, the zero of the scale may be brought opposite the reference mark or pointer on the mounting block when the elevation of sight base 24 for point blan range has been experimentally determined.

Mounted upon and for transverse adjustment with respect to the sight base 24 is a sighting member indicated generally by the numeral 55.

Said sighting member comprises a threaded aperture adapted to receive the threads of a transverse or windage adjustment screw 56. The sighting member 55 is suitably supported upon the sight base 24 to permit its transverse movement relative to said base with the rotation of a the screw 56. Said screw 56 is supported for rotation in the sight base 24 in a manner which may be substantially similar to the supporting of they screw 23, heretofore described in detail. Screw 56 is likewise provided with a manipulating finger piece 51 upon the periphery of which is inscribed an index 58 for co-operation with a reference mark 59, which reference mark, like the elevation reference mark 46, is located upon the rearsity for lowering the gun or substantially shifting from shooting position in order to effect adjustments which previous shots have indicated to be necessary is a distinct detriment.

The screw 56 and its finger piece 51 are so related to the sighting member 55 that the sighting member is moved to the left by a left hand rotation of the finger piece 51 and to the right by a right hand rotation of said finger piece. To secure this result, since the screw itself does not move longitudinally, and its rotation without longitudinal movement effects a transverse movement of the sighting member, the pitch of the co-operating threads on screw 56 and member 55 is reversed, the threads being made of left hand pitch. Thus, a left hand rotation of the finger piece is enabled to effect a leftward movement of said sighting member, while right hand rotation of the screw moves the sighting member to the right.

Any suitable form of sight surfaces may be supported upon the sighting member 55. The sighting elements which have been shown for purpose of illustration comprise a disk 60 provided with a threaded shank 6|, received in a threaded aperture in a depending part 62 of sighting member 55. Said disk 60 comprises a sight aperture 63. Variable apertures may be provided by eccentrically mounting in the disk GlLas at 64, a disk 65 provided with a number of apertures of varying size, any one of which may be brought into alignment with the aperture 63 by rotation of said disk 64. To provide for its manipulation, the periphery of disk 64 preferably projects slightly beyond the periphery of disk 60, as shown in Fig. 1.

The embodiment of the invention herein described and illustrated in the drawing is to be understood as typical and illustrative only, the invention being susceptible to incorporation in other forms, an falling within the scope of the appended claims.

What is claimed is:

1. In a firearm sight, in combination, a supporting block adapted for permanent attachment to a firearm, a sight mounting block adapted to engage and move longitudinally upon said supporting block, means for holding said mounting block against longitudinal movement on said supporting block comprising a lever pivoted in said mounting block and spring urged toward said supporting block, there being a recess in said supporting block adapted to receive a part of said lever, and settable means adapted to lock said lever engaged in said recess.

2. In a firearm sight comprising a sight base, a mounting block, and means for adjustably supporting said sight base on said mounting block comprising a screw rotatably supported in said sight base and having threads for engagement in a threaded aperture in said mounting block; mechanism for preventing lost motion between said mounting block and screw when the rotation of said screw is reversed comprising a bushing threaded onto said screw, and a member threaded to said mounting block and engaging said bushing.

3. In a firearm sight comprising a sight base, a mounting block, and means for adjustably supporting said sight base on said mounting block comprising a screw rotatably supported in said sight base and having threads for engagement in a threaded aperture in said mounting block; mechanism for preventing lost motion between said mounting block and screw when the rotation of said screw is reversed comprising a bushing threaded onto said screw, a sleeve abutting said bushing and adjustably held in said mounting block.

4. In a firearm sight comprising a sight base, a mounting block, and means for adjustably supporting said sight base on said mounting block comprising a screw rotatably supported in said sight base and having threads for engagement in a threaded aperture in said mounting block; mechanism for preventing lost motion between said mounting block and screw when the rotation of said screw is reversed comprising a bushing threaded onto said screw, a sleeve abutting said bushing and held in said mounting block, means for adjusting said sleeve in said mounting block, and means for holding said bushing in the position determined by the adjustment of said sleeve.

5. In a firearm, a sight base, a screw rotatably held in said sight base, a mounting block comprising a threaded aperture with which said screw engages, there being a bore in alignment with said threaded aperture, a bushing received in said bore and having a threaded connection with said screw, and a sleeve encircling said screw and adapted to abut said bushing, said sleeve having a longitudinally slotted portion and a threaded portion adapted to engage a threaded section of said bore, whereby said sleeve may be rotated in said bore and said bushing adjusted relative to said screw.

6. In a firearm sight, in combination, a supporting V-block adapted for permanent attachment to a firearm, a sight mounting block having a channel and a recess communicating with said channel and adapted to slide longitudinally over said supporting block with said block engaging in said channel, a lever pivoted for movement in said recess and projecting into said channel, means for urging said lever toward said channel, said supporting block having a recess adapted to receive the part of said lever thus projected into said channel, a finger piece for retracting said lever, and means for locking said lever against retraction.

KENNETH J. LOWE. 

